<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
<meta name="theme-color" content="#222" media="(prefers-color-scheme: light)">
<meta name="theme-color" content="#222" media="(prefers-color-scheme: dark)"><meta name="generator" content="Hexo 6.3.0">
<link rel="preconnect" href="https://fonts.googleapis.com" crossorigin>
  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png">
  <link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png">
  <link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png">
  <link rel="mask-icon" href="/images/logo.svg" color="#222">

<link rel="stylesheet" href="/css/main.css">

<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,300italic,400,400italic,700,700italic%7CZCOOL+QingKe+HuangYou:300,300italic,400,400italic,700,700italic%7CNoto+Sans+Simplified+Chinese:300,300italic,400,400italic,700,700italic%7CJetBrains+Mono:300,300italic,400,400italic,700,700italic&display=swap&subset=latin,latin-ext">

<link rel="stylesheet" href="/lib/@fortawesome/fontawesome-free/css/all.min.css" integrity="sha256-HtsXJanqjKTc8vVQjO4YMhiqFoXkfBsjBWcX91T1jr8=" crossorigin="anonymous">
  <link rel="stylesheet" href="/lib/animate.css/animate.min.css" integrity="sha256-PR7ttpcvz8qrF57fur/yAx1qXMFJeJFiA6pSzWi0OIE=" crossorigin="anonymous">
  <link rel="stylesheet" href="/lib/@fancyapps/ui/dist/fancybox/fancybox.css" integrity="sha256-RvRHGSuWAxZpXKV9lLDt2e+rZ+btzn48Wp4ueS3NZKs=" crossorigin="anonymous">

<script class="next-config" data-name="main" type="application/json">{"hostname":"wyatex.online","root":"/","images":"/images","scheme":"Pisces","darkmode":true,"version":"8.18.0","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":{"enable":true,"style":"mac"},"fold":{"enable":false,"height":500},"bookmark":{"enable":false,"color":"#222","save":"auto"},"mediumzoom":false,"lazyload":true,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"stickytabs":false,"motion":{"enable":true,"async":true,"transition":{"menu_item":"fadeInDown","post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"prism":false,"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"},"path":"/search.xml","localsearch":{"enable":true,"trigger":"auto","top_n_per_article":1,"unescape":false,"preload":true}}</script><script src="/js/config.js"></script>

    <meta name="description" content="使用LifeCycle的好处  帮助开发者建立可感知生命周期的组件 组件在其内部管理自己的生命周期，降低模块耦合度 降低内存泄漏发生的可能性 Activity、Fragment、Service、Application均有LifeCycle支持">
<meta property="og:type" content="article">
<meta property="og:title" content="安卓开发之Jetpack：LifeCycle">
<meta property="og:url" content="https://wyatex.online/%E5%AE%89%E5%8D%93/%E5%AE%89%E5%8D%93%E5%BC%80%E5%8F%91%E4%B9%8BJetpack%EF%BC%9ALifeCycle/index.html">
<meta property="og:site_name" content="Wyatex&#96;s blog">
<meta property="og:description" content="使用LifeCycle的好处  帮助开发者建立可感知生命周期的组件 组件在其内部管理自己的生命周期，降低模块耦合度 降低内存泄漏发生的可能性 Activity、Fragment、Service、Application均有LifeCycle支持">
<meta property="og:locale" content="zh_CN">
<meta property="article:published_time" content="2021-05-31T12:15:38.000Z">
<meta property="article:modified_time" content="2023-05-05T01:25:47.526Z">
<meta property="article:author" content="Wyatex">
<meta property="article:tag" content="学习笔记">
<meta property="article:tag" content="安卓">
<meta property="article:tag" content="Jetpack">
<meta name="twitter:card" content="summary">


<link rel="canonical" href="https://wyatex.online/%E5%AE%89%E5%8D%93/%E5%AE%89%E5%8D%93%E5%BC%80%E5%8F%91%E4%B9%8BJetpack%EF%BC%9ALifeCycle/">



<script class="next-config" data-name="page" type="application/json">{"sidebar":"","isHome":false,"isPost":true,"lang":"zh-CN","comments":true,"permalink":"https://wyatex.online/%E5%AE%89%E5%8D%93/%E5%AE%89%E5%8D%93%E5%BC%80%E5%8F%91%E4%B9%8BJetpack%EF%BC%9ALifeCycle/","path":"安卓/安卓开发之Jetpack：LifeCycle/","title":"安卓开发之Jetpack：LifeCycle"}</script>

<script class="next-config" data-name="calendar" type="application/json">""</script>
<title>安卓开发之Jetpack：LifeCycle | Wyatex`s blog</title>
  








  <noscript>
    <link rel="stylesheet" href="/css/noscript.css">
  </noscript>
</head>

<body itemscope itemtype="http://schema.org/WebPage" class="use-motion">
  <div class="headband"></div>

  <main class="main">
    <div class="column">
      <header class="header" itemscope itemtype="http://schema.org/WPHeader"><div class="site-brand-container">
  <div class="site-nav-toggle">
    <div class="toggle" aria-label="切换导航栏" role="button">
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
    </div>
  </div>

  <div class="site-meta">

    <a href="/" class="brand" rel="start">
      <i class="logo-line"></i>
      <p class="site-title">Wyatex`s blog</p>
      <i class="logo-line"></i>
    </a>
  </div>

  <div class="site-nav-right">
    <div class="toggle popup-trigger" aria-label="搜索" role="button">
        <i class="fa fa-search fa-fw fa-lg"></i>
    </div>
  </div>
</div>



<nav class="site-nav">
  <ul class="main-menu menu"><li class="menu-item menu-item-home"><a href="/" rel="section"><i class="fa fa-home fa-fw"></i>首页</a></li><li class="menu-item menu-item-about"><a href="/about/" rel="section"><i class="fa fa-user fa-fw"></i>关于</a></li><li class="menu-item menu-item-tags"><a href="/tags/" rel="section"><i class="fa fa-tags fa-fw"></i>标签<span class="badge">97</span></a></li><li class="menu-item menu-item-categories"><a href="/categories/" rel="section"><i class="fa fa-th fa-fw"></i>分类<span class="badge">26</span></a></li><li class="menu-item menu-item-archives"><a href="/archives/" rel="section"><i class="fa fa-archive fa-fw"></i>归档<span class="badge">155</span></a></li><li class="menu-item menu-item-编程"><a href="/programming/" rel="section"><i class="fa fa-book fa-fw"></i>编程</a></li><li class="menu-item menu-item-蹲坑读物"><a href="/%E5%B9%B2%E8%B4%A7/%E5%BC%80%E5%8F%91%E4%BA%A4%E6%B5%81%E7%BE%A4%E5%88%86%E4%BA%AB%E8%AE%B0%E5%BD%95/" rel="section"><i class="fa fa-book fa-fw"></i>蹲坑读物</a></li>
      <li class="menu-item menu-item-search">
        <a role="button" class="popup-trigger"><i class="fa fa-search fa-fw"></i>搜索
        </a>
      </li>
  </ul>
</nav>



  <div class="search-pop-overlay">
    <div class="popup search-popup"><div class="search-header">
  <span class="search-icon">
    <i class="fa fa-search"></i>
  </span>
  <div class="search-input-container">
    <input autocomplete="off" autocapitalize="off" maxlength="80"
           placeholder="搜索..." spellcheck="false"
           type="search" class="search-input">
  </div>
  <span class="popup-btn-close" role="button">
    <i class="fa fa-times-circle"></i>
  </span>
</div>
<div class="search-result-container no-result">
  <div class="search-result-icon">
    <i class="fa fa-spinner fa-pulse fa-5x"></i>
  </div>
</div>

    </div>
  </div>

</header>
        
  
  <aside class="sidebar">

    <div class="sidebar-inner sidebar-nav-active sidebar-toc-active">
      <ul class="sidebar-nav">
        <li class="sidebar-nav-toc">
          文章目录
        </li>
        <li class="sidebar-nav-overview">
          站点概览
        </li>
      </ul>

      <div class="sidebar-panel-container">
        <!--noindex-->
        <div class="post-toc-wrap sidebar-panel">
            <div class="post-toc animated"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#%E8%A7%A3%E8%80%A6%E9%A1%B5%E9%9D%A2%E5%92%8C%E7%BB%84%E4%BB%B6"><span class="nav-number">1.</span> <span class="nav-text">解耦页面和组件</span></a></li><li class="nav-item nav-level-1"><a class="nav-link" href="#%E7%BB%84%E4%BB%B6%E4%B8%8EService%E8%A7%A3%E8%80%A6"><span class="nav-number">2.</span> <span class="nav-text">组件与Service解耦</span></a></li><li class="nav-item nav-level-1"><a class="nav-link" href="#%E7%9B%91%E5%90%AC%E5%BA%94%E7%94%A8%E7%A8%8B%E5%BA%8F%E7%94%9F%E5%91%BD%E5%91%A8%E6%9C%9F"><span class="nav-number">3.</span> <span class="nav-text">监听应用程序生命周期</span></a></li></ol></div>
        </div>
        <!--/noindex-->

        <div class="site-overview-wrap sidebar-panel">
          <div class="site-author animated" itemprop="author" itemscope itemtype="http://schema.org/Person">
    <img class="site-author-image" itemprop="image" alt="Wyatex"
      src="/images/avatar.jpg">
  <p class="site-author-name" itemprop="name">Wyatex</p>
  <div class="site-description" itemprop="description">这里是我用来做笔记的网站哟~</div>
</div>
<div class="site-state-wrap animated">
  <nav class="site-state">
      <div class="site-state-item site-state-posts">
        <a href="/archives/">
          <span class="site-state-item-count">155</span>
          <span class="site-state-item-name">日志</span>
        </a>
      </div>
      <div class="site-state-item site-state-categories">
          <a href="/categories/">
        <span class="site-state-item-count">26</span>
        <span class="site-state-item-name">分类</span></a>
      </div>
      <div class="site-state-item site-state-tags">
          <a href="/tags/">
        <span class="site-state-item-count">97</span>
        <span class="site-state-item-name">标签</span></a>
      </div>
  </nav>
</div>
  <div class="links-of-author animated">
      <span class="links-of-author-item">
        <a href="https://github.com/wyatex" title="GitHub → https:&#x2F;&#x2F;github.com&#x2F;wyatex" rel="noopener me" target="_blank"><i class="fab fa-github fa-fw"></i>GitHub</a>
      </span>
      <span class="links-of-author-item">
        <a href="mailto:wyatex@qq.com" title="E-Mail → mailto:wyatex@qq.com" rel="noopener me" target="_blank"><i class="fa fa-envelope fa-fw"></i>E-Mail</a>
      </span>
  </div>

        </div>
      </div>
    </div>

    
    <div class="sidebar-inner sidebar-blogroll">
      <div class="links-of-blogroll animated">
        <div class="links-of-blogroll-title"><i class="fa fa-globe fa-fw"></i>
          链接
        </div>
        <ul class="links-of-blogroll-list">
            <li class="links-of-blogroll-item">
              <a href="https://antfu.me/" title="https:&#x2F;&#x2F;antfu.me&#x2F;" rel="noopener" target="_blank">Anthony Fu</a>
            </li>
            <li class="links-of-blogroll-item">
              <a href="https://www.codesky.me/" title="https:&#x2F;&#x2F;www.codesky.me&#x2F;" rel="noopener" target="_blank">CodeSky</a>
            </li>
            <li class="links-of-blogroll-item">
              <a href="https://learn.lianglianglee.com/" title="https:&#x2F;&#x2F;learn.lianglianglee.com&#x2F;" rel="noopener" target="_blank">技术文章摘抄</a>
            </li>
        </ul>
      </div>
    </div>
        <div class="pjax">
        <div class="sidebar-inner sidebar-post-related">
          <div class="animated">
              <div class="links-of-blogroll-title"><i class="fa fa-signs-post fa-fw"></i>
    相关文章
  </div>
  <ul class="popular-posts">
    <li class="popular-posts-item">
      <a class="popular-posts-link" href="/%E5%A4%8D%E4%B9%A0%E9%A2%98/Android%E5%A4%8D%E4%B9%A0%E9%A2%98/" rel="bookmark">
        <time class="popular-posts-time">2020-12-24</time>
        <br>
      Android复习题
      </a>
    </li>
    <li class="popular-posts-item">
      <a class="popular-posts-link" href="/%E5%AE%89%E5%8D%93/%E5%AE%89%E5%8D%93%E5%BC%80%E5%8F%91%E4%B9%8BJetpack%EF%BC%9ALiveData/" rel="bookmark">
        <time class="popular-posts-time">2021-06-01</time>
        <br>
      安卓开发之Jetpack：LiveData
      </a>
    </li>
  </ul>

          </div>
        </div>
        </div>
  </aside>


    </div>

    <div class="main-inner post posts-expand">


  


<div class="post-block">
  
  

  <article itemscope itemtype="http://schema.org/Article" class="post-content" lang="zh-CN">
    <link itemprop="mainEntityOfPage" href="https://wyatex.online/%E5%AE%89%E5%8D%93/%E5%AE%89%E5%8D%93%E5%BC%80%E5%8F%91%E4%B9%8BJetpack%EF%BC%9ALifeCycle/">

    <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
      <meta itemprop="image" content="/images/avatar.jpg">
      <meta itemprop="name" content="Wyatex">
    </span>

    <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
      <meta itemprop="name" content="Wyatex`s blog">
      <meta itemprop="description" content="这里是我用来做笔记的网站哟~">
    </span>

    <span hidden itemprop="post" itemscope itemtype="http://schema.org/CreativeWork">
      <meta itemprop="name" content="安卓开发之Jetpack：LifeCycle | Wyatex`s blog">
      <meta itemprop="description" content="">
    </span>
      <header class="post-header">
        <h1 class="post-title" itemprop="name headline">
          安卓开发之Jetpack：LifeCycle
        </h1>

        <div class="post-meta-container">
          <div class="post-meta">
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-calendar"></i>
      </span>
      <span class="post-meta-item-text">发表于</span>

      <time title="创建时间：2021-05-31 20:15:38" itemprop="dateCreated datePublished" datetime="2021-05-31T20:15:38+08:00">2021-05-31</time>
    </span>
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-calendar-check"></i>
      </span>
      <span class="post-meta-item-text">更新于</span>
      <time title="修改时间：2023-05-05 09:25:47" itemprop="dateModified" datetime="2023-05-05T09:25:47+08:00">2023-05-05</time>
    </span>
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-folder"></i>
      </span>
      <span class="post-meta-item-text">分类于</span>
        <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
          <a href="/categories/%E5%AE%89%E5%8D%93/" itemprop="url" rel="index"><span itemprop="name">安卓</span></a>
        </span>
    </span>

  
    <span class="post-meta-item" title="阅读次数" id="busuanzi_container_page_pv">
      <span class="post-meta-item-icon">
        <i class="far fa-eye"></i>
      </span>
      <span class="post-meta-item-text">阅读次数：</span>
      <span id="busuanzi_value_page_pv"></span>
    </span>
</div>

        </div>
      </header>

    
    
    
    <div class="post-body" itemprop="articleBody"><p>使用LifeCycle的好处</p>
<ul>
<li>帮助开发者建立可感知生命周期的组件</li>
<li>组件在其内部管理自己的生命周期，降低模块耦合度</li>
<li>降低内存泄漏发生的可能性</li>
<li>Activity、Fragment、Service、Application均有LifeCycle支持</li>
</ul>
<span id="more"></span>

<h1 id="解耦页面和组件"><a href="#解耦页面和组件" class="headerlink" title="解耦页面和组件"></a>解耦页面和组件</h1><p>这里使用Chronometer组件进行演示。<br>创建一个自己的MyChronometer类：</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">MyChronometer</span> <span class="keyword">extends</span> <span class="title class_">Chronometer</span> <span class="keyword">implements</span> <span class="title class_">LifecycleObserver</span> &#123;</span><br><span class="line">    <span class="keyword">private</span> <span class="type">long</span> time;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="title function_">MyChronometer</span><span class="params">(Context context, AttributeSet attributeSet)</span> &#123;</span><br><span class="line">        <span class="built_in">super</span>(context, attributeSet);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_RESUME)</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">void</span> <span class="title function_">startMeter</span><span class="params">()</span> &#123;</span><br><span class="line">        setBase(SystemClock.elapsedRealtime() - time);</span><br><span class="line">        start();</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">void</span> <span class="title function_">stopMeter</span><span class="params">()</span> &#123;</span><br><span class="line">        time = SystemClock.elapsedRealtime() - getBase();</span><br><span class="line">        stop();</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>在布局界面使用这个组件</p>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">&lt;?xml version=<span class="string">&quot;1.0&quot;</span> encoding=<span class="string">&quot;utf-8&quot;</span>?&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">androidx.constraintlayout.widget.ConstraintLayout</span> <span class="attr">xmlns:android</span>=<span class="string">&quot;http://schemas.android.com/apk/res/android&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">xmlns:app</span>=<span class="string">&quot;http://schemas.android.com/apk/res-auto&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">xmlns:tools</span>=<span class="string">&quot;http://schemas.android.com/tools&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">android:layout_width</span>=<span class="string">&quot;match_parent&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">android:layout_height</span>=<span class="string">&quot;match_parent&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">tools:context</span>=<span class="string">&quot;.MainActivity&quot;</span>&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="tag">&lt;<span class="name">com.example.lifecycle.MyChronometer</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:id</span>=<span class="string">&quot;@+id/chronometer&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:layout_width</span>=<span class="string">&quot;wrap_content&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:layout_height</span>=<span class="string">&quot;wrap_content&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:text</span>=<span class="string">&quot;Hello World!&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:textSize</span>=<span class="string">&quot;34sp&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintBottom_toBottomOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintLeft_toLeftOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintRight_toRightOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintTop_toTopOf</span>=<span class="string">&quot;parent&quot;</span> /&gt;</span></span><br><span class="line"></span><br><span class="line"><span class="tag">&lt;/<span class="name">androidx.constraintlayout.widget.ConstraintLayout</span>&gt;</span></span><br></pre></td></tr></table></figure>
<p>在activity启动时添加监听</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.example.lifecycle;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> androidx.appcompat.app.AppCompatActivity;</span><br><span class="line"><span class="keyword">import</span> android.os.Bundle;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">MainActivity</span> <span class="keyword">extends</span> <span class="title class_">AppCompatActivity</span> &#123;</span><br><span class="line">    <span class="keyword">private</span> MyChronometer myChronometer;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="keyword">protected</span> <span class="keyword">void</span> <span class="title function_">onCreate</span><span class="params">(Bundle savedInstanceState)</span> &#123;</span><br><span class="line">        <span class="built_in">super</span>.onCreate(savedInstanceState);</span><br><span class="line">        setContentView(R.layout.activity_main);</span><br><span class="line">        myChronometer = findViewById(R.id.chronometer);</span><br><span class="line">        getLifecycle().addObserver(myChronometer);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>这样组件跟activity就已经解耦了，不再需要在activity里管理组件的生命周期</p>
<h1 id="组件与Service解耦"><a href="#组件与Service解耦" class="headerlink" title="组件与Service解耦"></a>组件与Service解耦</h1><p>创建一个定位Service：<br>MyLocationObserver.java:</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.example.lifecycle;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> android.Manifest;</span><br><span class="line"><span class="keyword">import</span> android.content.Context;</span><br><span class="line"><span class="keyword">import</span> android.content.pm.PackageManager;</span><br><span class="line"><span class="keyword">import</span> android.location.Location;</span><br><span class="line"><span class="keyword">import</span> android.location.LocationListener;</span><br><span class="line"><span class="keyword">import</span> android.location.LocationManager;</span><br><span class="line"><span class="keyword">import</span> android.util.Log;</span><br><span class="line"><span class="keyword">import</span> androidx.annotation.NonNull;</span><br><span class="line"><span class="keyword">import</span> androidx.core.app.ActivityCompat;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.Lifecycle;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.LifecycleObserver;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.OnLifecycleEvent;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">MyLocationObserver</span>  <span class="keyword">implements</span> <span class="title class_">LifecycleObserver</span> &#123;</span><br><span class="line">    <span class="keyword">private</span> Context context;</span><br><span class="line">    <span class="keyword">private</span> LocationListener locationListener;</span><br><span class="line">    <span class="keyword">private</span> LocationManager locationManager;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="title function_">MyLocationObserver</span><span class="params">(Context context)</span> &#123;</span><br><span class="line">        <span class="built_in">this</span>.context = context;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_CREATE)</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">void</span> <span class="title function_">startGetLocation</span><span class="params">()</span> &#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;startGetLocation&quot;</span>);</span><br><span class="line">        locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);</span><br><span class="line">        locationListener = <span class="keyword">new</span> <span class="title class_">MyLocationListener</span>();</span><br><span class="line">        <span class="keyword">if</span> (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &amp;&amp; ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) &#123;</span><br><span class="line">            <span class="keyword">return</span>;</span><br><span class="line">        &#125;</span><br><span class="line">        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, <span class="number">3000</span>, <span class="number">1</span>, locationListener);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)</span></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">void</span> <span class="title function_">stopGetLocation</span><span class="params">()</span> &#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;stopGetLocation&quot;</span>);</span><br><span class="line">        locationManager.removeUpdates(locationListener);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">static</span> <span class="keyword">class</span> <span class="title class_">MyLocationListener</span> <span class="keyword">implements</span> <span class="title class_">LocationListener</span> &#123;</span><br><span class="line">        <span class="meta">@Override</span></span><br><span class="line">        <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onLocationChanged</span><span class="params">(<span class="meta">@NonNull</span> Location location)</span> &#123;</span><br><span class="line">            Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;location changed: &quot;</span> + location.toString());</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>MyLocationService.java:</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.example.lifecycle;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> android.util.Log;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.LifecycleService;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">MyLocationService</span> <span class="keyword">extends</span> <span class="title class_">LifecycleService</span> &#123;</span><br><span class="line">    <span class="keyword">public</span> <span class="title function_">MyLocationService</span><span class="params">()</span> &#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;MyLocationService: &quot;</span>);</span><br><span class="line">        <span class="type">MyLocationObserver</span> <span class="variable">observer</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="title class_">MyLocationObserver</span>(<span class="built_in">this</span>);</span><br><span class="line">        getLifecycle().addObserver(observer);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<p>在activity里创建两个button：</p>
<figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">&lt;?xml version=<span class="string">&quot;1.0&quot;</span> encoding=<span class="string">&quot;utf-8&quot;</span>?&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">androidx.constraintlayout.widget.ConstraintLayout</span> <span class="attr">xmlns:android</span>=<span class="string">&quot;http://schemas.android.com/apk/res/android&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">xmlns:app</span>=<span class="string">&quot;http://schemas.android.com/apk/res-auto&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">xmlns:tools</span>=<span class="string">&quot;http://schemas.android.com/tools&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">android:layout_width</span>=<span class="string">&quot;match_parent&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">android:layout_height</span>=<span class="string">&quot;match_parent&quot;</span></span></span><br><span class="line"><span class="tag">    <span class="attr">tools:context</span>=<span class="string">&quot;.two&quot;</span>&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="tag">&lt;<span class="name">Button</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:id</span>=<span class="string">&quot;@+id/button&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:layout_width</span>=<span class="string">&quot;wrap_content&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:layout_height</span>=<span class="string">&quot;wrap_content&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:fontFamily</span>=<span class="string">&quot;monospace&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:onClick</span>=<span class="string">&quot;startGps&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:text</span>=<span class="string">&quot;开始&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:textSize</span>=<span class="string">&quot;34sp&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintBottom_toBottomOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintEnd_toEndOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintStart_toStartOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintTop_toTopOf</span>=<span class="string">&quot;parent&quot;</span> /&gt;</span></span><br><span class="line"></span><br><span class="line">    <span class="tag">&lt;<span class="name">Button</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:id</span>=<span class="string">&quot;@+id/button2&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:layout_width</span>=<span class="string">&quot;wrap_content&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:layout_height</span>=<span class="string">&quot;wrap_content&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:layout_marginTop</span>=<span class="string">&quot;24dp&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:fontFamily</span>=<span class="string">&quot;monospace&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:onClick</span>=<span class="string">&quot;stopGps&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:text</span>=<span class="string">&quot;停止&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">android:textSize</span>=<span class="string">&quot;34sp&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintEnd_toEndOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintStart_toStartOf</span>=<span class="string">&quot;parent&quot;</span></span></span><br><span class="line"><span class="tag">        <span class="attr">app:layout_constraintTop_toBottomOf</span>=<span class="string">&quot;@+id/button&quot;</span> /&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">androidx.constraintlayout.widget.ConstraintLayout</span>&gt;</span></span><br></pre></td></tr></table></figure>

<p>然后在activity加上两个onCLick事件：</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.example.lifecycle;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> androidx.appcompat.app.AppCompatActivity;</span><br><span class="line"><span class="keyword">import</span> android.content.Intent;</span><br><span class="line"><span class="keyword">import</span> android.os.Bundle;</span><br><span class="line"><span class="keyword">import</span> android.view.View;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">two</span> <span class="keyword">extends</span> <span class="title class_">AppCompatActivity</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="keyword">protected</span> <span class="keyword">void</span> <span class="title function_">onCreate</span><span class="params">(Bundle savedInstanceState)</span> &#123;</span><br><span class="line">        <span class="built_in">super</span>.onCreate(savedInstanceState);</span><br><span class="line">        setContentView(R.layout.activity_two);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">stopGps</span><span class="params">(View view)</span> &#123;</span><br><span class="line">        stopService(<span class="keyword">new</span> <span class="title class_">Intent</span>(<span class="built_in">this</span>, MyLocationService.class));</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">startGps</span><span class="params">(View view)</span> &#123;</span><br><span class="line">        startService(<span class="keyword">new</span> <span class="title class_">Intent</span>(<span class="built_in">this</span>, MyLocationService.class));</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h1 id="监听应用程序生命周期"><a href="#监听应用程序生命周期" class="headerlink" title="监听应用程序生命周期"></a>监听应用程序生命周期</h1><p>创建一个ApplicationObserver.java:</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.example.lifecycle;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> android.util.Log;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.Lifecycle;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.LifecycleObserver;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.OnLifecycleEvent;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">ApplicationObserver</span> <span class="keyword">implements</span> <span class="title class_">LifecycleObserver</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_CREATE)</span></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onCreate</span><span class="params">()</span>&#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;onCreate: &quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_START)</span></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onStart</span><span class="params">()</span>&#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;onStart: &quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_RESUME)</span></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onResume</span><span class="params">()</span>&#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;onResume: &quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)</span></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onPause</span><span class="params">()</span>&#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;onPause: &quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_STOP)</span></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onStop</span><span class="params">()</span>&#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;onStop: &quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)</span></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onDestroy</span><span class="params">()</span>&#123;</span><br><span class="line">        Log.d(<span class="string">&quot;lc&quot;</span>, <span class="string">&quot;onDestroy: &quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>然后创建一个MyApplication.java:</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.example.lifecycle;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> android.app.Application;</span><br><span class="line"><span class="keyword">import</span> androidx.lifecycle.ProcessLifecycleOwner;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">MyApplication</span> <span class="keyword">extends</span> <span class="title class_">Application</span> &#123;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">onCreate</span><span class="params">()</span> &#123;</span><br><span class="line">        <span class="built_in">super</span>.onCreate();</span><br><span class="line">        ProcessLifecycleOwner.get().getLifecycle().addObserver(<span class="keyword">new</span> <span class="title class_">ApplicationObserver</span>());</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<p>在manifest里的application标签添加属性：<code>android:name=&quot;.MyApplication&quot;</code>。<br>至此ApplicationObserver就会监听整个Application，而且Application与Activity无关，只要有一个activity是在运行，application就是onResume之后的状态，所有的activity都onPause那么application也就onPause。</p>

    </div>

    
    
    

    <footer class="post-footer">
          

<div class="post-copyright">
<ul>
  <li class="post-copyright-author">
      <strong>本文作者： </strong>Wyatex
  </li>
  <li class="post-copyright-link">
      <strong>本文链接：</strong>
      <a href="https://wyatex.online/%E5%AE%89%E5%8D%93/%E5%AE%89%E5%8D%93%E5%BC%80%E5%8F%91%E4%B9%8BJetpack%EF%BC%9ALifeCycle/" title="安卓开发之Jetpack：LifeCycle">https://wyatex.online/安卓/安卓开发之Jetpack：LifeCycle/</a>
  </li>
  <li class="post-copyright-license">
      <strong>版权声明： </strong>本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.zh" rel="noopener" target="_blank"><i class="fab fa-fw fa-creative-commons"></i>BY-NC-SA</a> 许可协议。转载请注明出处！
  </li>
</ul>
</div>

          <div class="post-tags">
              <a href="/tags/%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/" rel="tag"># 学习笔记</a>
              <a href="/tags/%E5%AE%89%E5%8D%93/" rel="tag"># 安卓</a>
              <a href="/tags/Jetpack/" rel="tag"># Jetpack</a>
          </div>

        

          <div class="post-nav">
            <div class="post-nav-item">
                <a href="/%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/%E6%95%B0%E6%8D%AE%E4%BB%93%E5%BA%93%E4%B8%8E%E6%95%B0%E6%8D%AE%E6%8C%96%E6%8E%98%E5%AD%A6%E4%B9%A0%E7%AC%94%E8%AE%B0/" rel="prev" title="数据仓库与数据挖掘学习笔记">
                  <i class="fa fa-angle-left"></i> 数据仓库与数据挖掘学习笔记
                </a>
            </div>
            <div class="post-nav-item">
                <a href="/%E5%AE%89%E5%8D%93/%E5%AE%89%E5%8D%93%E5%BC%80%E5%8F%91%E4%B9%8BJetpack%EF%BC%9AViewModel/" rel="next" title="安卓开发之Jetpack：ViewModel">
                  安卓开发之Jetpack：ViewModel <i class="fa fa-angle-right"></i>
                </a>
            </div>
          </div>
    </footer>
  </article>
</div>






</div>
  </main>

  <footer class="footer">
    <div class="footer-inner">

  <div class="copyright">
    &copy; 2019 – 
    <span itemprop="copyrightYear">2024</span>
    <span class="with-love">
      <i class="fa fa-heart"></i>
    </span>
    <span class="author" itemprop="copyrightHolder">Wyatex</span>
  </div>
<div class="busuanzi-count">
    <span class="post-meta-item" id="busuanzi_container_site_uv">
      <span class="post-meta-item-icon">
        <i class="fa fa-user"></i>
      </span>
      <span class="site-uv" title="总访客量">
        <span id="busuanzi_value_site_uv"></span>
      </span>
    </span>
    <span class="post-meta-item" id="busuanzi_container_site_pv">
      <span class="post-meta-item-icon">
        <i class="fa fa-eye"></i>
      </span>
      <span class="site-pv" title="总访问量">
        <span id="busuanzi_value_site_pv"></span>
      </span>
    </span>
</div>

    </div>
  </footer>

  
  <div class="back-to-top" role="button" aria-label="返回顶部">
    <i class="fa fa-arrow-up fa-lg"></i>
    <span>0%</span>
  </div>
  <div class="reading-progress-bar"></div>

<noscript>
  <div class="noscript-warning">Theme NexT works best with JavaScript enabled</div>
</noscript>


  
  <script size="300" alpha="0.6" zIndex="-1" src="/lib/ribbon.js/dist/ribbon.min.js"></script>
  <script src="/lib/animejs/lib/anime.min.js" integrity="sha256-XL2inqUJaslATFnHdJOi9GfQ60on8Wx1C2H8DYiN1xY=" crossorigin="anonymous"></script>
  <script src="/lib/@next-theme/pjax/pjax.min.js" integrity="sha256-vxLn1tSKWD4dqbMRyv940UYw4sXgMtYcK6reefzZrao=" crossorigin="anonymous"></script>
  <script src="/lib/@fancyapps/ui/dist/fancybox/fancybox.umd.js" integrity="sha256-q8XkJ6dj5VwSvzI8+nATCHHQG+Xv/dAZBCgqmu93zOY=" crossorigin="anonymous"></script>
  <script src="/lib/lozad/dist/lozad.min.js" integrity="sha256-mOFREFhqmHeQbXpK2lp4nA3qooVgACfh88fpJftLBbc=" crossorigin="anonymous"></script>
<script src="/js/comments.js"></script><script src="/js/utils.js"></script><script src="/js/motion.js"></script><script src="/js/next-boot.js"></script><script src="/js/pjax.js"></script>

  <script src="/lib/hexo-generator-searchdb/dist/search.js" integrity="sha256-1kfA5uHPf65M5cphT2dvymhkuyHPQp5A53EGZOnOLmc=" crossorigin="anonymous"></script>
<script src="/js/third-party/search/local-search.js"></script>




  <script src="/js/third-party/fancybox.js"></script>



  
  <script data-pjax async src="https://busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script>





</body>
</html>
